Removal of Cu(II), Cd(II) and Cr(III) ions from aqueous solution by dam silt

Fatima Ouadjenia-Marouf, Reda Marouf, Jacques Schott, Ahmed Yahiaoui
2013 Arabian Journal of Chemistry  
The removal of heavy metals, such as Cu(II), Cd(II) and Cr(III) from aqueous solution was studied using Chorfa silt material (Mascara, Algeria). The main constituents of silt sediment are quartz, calcite and mixture of clays. The experimental data were described using Freundlich, Langmuir, Dubinin-Radushkevich (D-R) and Langmuir-Freundlich models. The adsorbed amounts of chromium and copper ions were very high (95% and 94% of the total concentration of the metal ions), whereas cadmium ion was
more » ... s cadmium ion was adsorbed in smaller (55%) amounts. The Langmuir-Freundlich isotherm model was the best to describe the experimental data. The maximum sorption capacity was found to be 26.30, 11.76 and 0.35 mg/g for Cr 3+ , Cu 2+ and Cd 2+ , respectively. The results of mean sorption energy, E (kJ/mol) calculated from D-R equation, confirmed that the adsorption of copper, chromium and cadmium on silt is physical in nature.
doi:10.1016/j.arabjc.2010.10.018 fatcat:v24jjbdqzzhxfjwbh6eawzqlie